| Cite this article: | 宁松瑞,颜 安,柳维扬.膜下滴灌棉花地上干物质积累与分配特征的模拟与分析[J].灌溉排水学报,2022,(10):-. |
| NING Songrui,YAN An,LIU Weiyang.膜下滴灌棉花地上干物质积累与分配特征的模拟与分析[J].灌溉排水学报,2022,(10):-. |
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| Simulation and Analysis of the Aboveground Dry Material Accumulation and Distribution Characteristics of Cotton under Film Mulched Drip Irrigation |
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NING Songrui1,2,3,2,4,5,6,5,7,5, YAN An6, LIU Weiyang7
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1.State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi'2.'3.an University of Technology,Xi'4.an;5.China;6.College of Pratacultural and Environmental Sciences,Xinjiang Agricultural University;7.College of Agriculture,Tarim University
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| Abstract: |
| Quantitative simulation of the accumulation and distribution characteristics of cotton dry material under film mulched drip irrigation can provide a basis for high-yield cotton cultivation. Seven topdressing treatments in saline-alkali cotton fields in southern Xinjiang as: CK (0:0:0, N:P2O5:K2O), A (1:1:1), B (1:0.25:1.25), C (1:0.4:0.27), D (1:0.23:0.20), E (1:0.34:0.23) and F (1:0.17:0). In this study, the influence of each treatment on the accumulation and distribution of dry material of each organ (leaf, stem, bud bell) was analyzed, the dynamic models of relative dry material accumulation and organ distribution of cotton were established, and quantified the dynamic characteristics of the accumulation and distribution of cotton dry material. With the extension of growth time, the accumulation of dry material in each treated cotton group increased first and then decreased, the leaf distribution index increased first and then decreased, the stem distribution index was decreasing, and the bud and bell distribution index showed an increasing trend. Based on relative growth time (x), the dynamic model of dry material accumulation RY = a/(1+exp(bx+c)) and the dynamic model of each organ allocation RC = (d+ex)/(1+fx+gx2) with the parameter values were determined. The literature data validation showed that the models of dry material accumulation and organ distribution with its parameters all have higher universality and simulation accuracy. The parameters of dry material accumulation by using the dynamic model of cotton dry material accumulation was analyzed. Compared with CK treatment, the maximum rates of dry material accumulation with A, B, C, D, E and F treatments were increased by 11.21%, 11.32%, 13.22%, 4.22%, 14.30% and 10.05%, and the time of dry material accumulation with A, B, C, D, E and F treatments were decreased by 4.98%, 3.09%, 3.66%, 2.07%, 4.97%, and 3.85%. Cotton yield and utilization efficiency of fertilizer were closely related to the growth characteristic parameters of dry matter accumulation process. E treatment was the beneficial to the accumulation of cotton dry material under membrane drip irrigation and the reasonable distribution of organ dry material. |
| Key words: Cotton; normalized method; dry material accumulation; growth model; fertilizer efficiency |
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